Renewable Energy Systems
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This paper aims to identify challenges and opportunities that are associated with installing PV (Photovoltaic) systems in existing residential building complexes in Vienna. For this purpose, a project-oriented approach was chosen and hence a representative residential building complex in Vienna was chosen and analyzed to demonstrate the challenges that are associated with such projects. Furthermore, a particular focus lies on exploring different operating models that are available when it comes to the execution of such a project. As this paper builds on the rather novel topic of exploring new operating models for installing PV systems on existing residential building complexes in Vienna, many further suggestions for research can be identified that exceed the scope of this paper.
The energy crisis and environment deterioration are two major problems for the 21st century. Waste heat recovery offers many opportunities to make a global contribution to this challenge. Key concepts such as waste heat recovery are the basic ideas in thermoelectricity. A part of waste heat is produced by solid-fuel stoves. Nevertheless, the quantity of high-performance solid-fuel stoves is increasing very quickly for economic and environmental reasons. These sophisticated stoves need electricity for the pump for water circulation and the control system. Thermoelectric generators (TEG) could help with this issue. This work aims to present an experimental validation of integrating a thermoelectric generator into a solid-fuel stove. An economic comparison between the most common Bismuth Telluride (Bi2Te3) module and the newly developed half-Heusler modules is complete. An experimental set-up was built to optimize the common (Bi2Te3) modules and test the newly developed half-Heusler modules from an entire system point of view. An assessment of thermoelectric technology potential, module prices, further material developments and applications is completed. Based on the literature research and a Computational Fluid Dynamics (CFD) simulation software the first prototype was built. This set-up is composed of a thermal loop with a hot gas source, a cold fluid, a hot fin exchanger, and thermoelectric modules. The number and the place of these modules are changed to study different configurations. A specific maximum power point tracker DC/DC converter charging a battery is added in order to study the electrical power produced by the module. Different operating points of hot inlet gas airflow were tested for the Bismuth Telluride and half-Heusler modules. The Bismuth Telluride module was tested under real-life conditions using the exhaust of the solid-fuel stoves without influencing the combustion chamber.
Decentralized Energy Networks based on Blockchain: Background, Overview and Concept Discussion
(2018)
This paper provides a snapshot of the globally ongoing decentralization of (business) relations in the energy sector. This tendency can be observed in other domains as well and is accompanied by new digital technological developments. Blockchain technology is assigned disruptive potential when it comes to realize those decentralization ideas. This hype about Blockchain is mainly company-driven without a solid academic basis yet. The authors are currently involved in several research efforts for utilizing distributed energy resources like photovoltaic systems, batteries and electric cars for the setup of energy communities and marketplaces. The paper, therefore, presents detailed investigations of background and motivations for decentralization and the building of (local) energy communities and (peer-to-peer) marketplaces for sustainable utilization of renewable energies. An overview of recent related Blockchain-based works is presented, and the current state and feasibility for the realization of the envisioned decentralized solutions are discussed. In this way, the work aimed at contributing to a research-based decision foundation for upcoming Blockchain-based decentralization efforts.
Operational Behaviour of SWT
(2018)
Smart City Micro Quarters
(2018)
Kleinwindkraft in Österreich
(2015)